[PATCH] [14/50] powerpc/pseries/hvconsole: Fix dropped console output

[Andi Kleen]

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: Anton Blanchard <anton@xxxxxxxxx>

[ upstream commit 51d33021425e1f905beb4208823146f2fb6517da ]

Return -EAGAIN when we get H_BUSY back from the hypervisor. This
makes the hvc console driver retry, avoiding dropped printks.

Signed-off-by: Anton Blanchard <anton@xxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>

Index: linux-2.6.35.y/arch/powerpc/platforms/pseries/hvconsole.c
===================================================================
--- linux-2.6.35.y.orig/arch/powerpc/platforms/pseries/hvconsole.c
+++ linux-2.6.35.y/arch/powerpc/platforms/pseries/hvconsole.c
@@ -73,7 +73,7 @@ int hvc_put_chars(uint32_t vtermno, cons
 	if (ret == H_SUCCESS)
 		return count;
 	if (ret == H_BUSY)
-		return 0;
+		return -EAGAIN;
 	return -EIO;
 }
 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/